/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.parquet.filter2.recordlevel;

import java.util.Objects;
import org.apache.parquet.column.Dictionary;
import org.apache.parquet.filter2.recordlevel.IncrementallyUpdatedFilterPredicate.ValueInspector;
import org.apache.parquet.io.api.Binary;
import org.apache.parquet.io.api.PrimitiveConverter;

/**
 * see {@link FilteringRecordMaterializer}
 * <p>
 * This pass-through proxy for a delegate {@link PrimitiveConverter} also
 * updates the {@link ValueInspector}s of a {@link IncrementallyUpdatedFilterPredicate}
 */
public class FilteringPrimitiveConverter extends PrimitiveConverter {
  private final PrimitiveConverter delegate;
  private final ValueInspector[] valueInspectors;

  public FilteringPrimitiveConverter(PrimitiveConverter delegate, ValueInspector[] valueInspectors) {
    this.delegate = Objects.requireNonNull(delegate, "delegate cannot be null");
    this.valueInspectors = Objects.requireNonNull(valueInspectors, "valueInspectors cannot be null");
  }

  // TODO: this works, but
  // TODO: essentially turns off the benefits of dictionary support
  // TODO: even if the underlying delegate supports it.
  // TODO: we should support it here. (https://issues.apache.org/jira/browse/PARQUET-36)
  @Override
  public boolean hasDictionarySupport() {
    return false;
  }

  @Override
  public void setDictionary(Dictionary dictionary) {
    throw new UnsupportedOperationException("FilteringPrimitiveConverter doesn't have dictionary support");
  }

  @Override
  public void addValueFromDictionary(int dictionaryId) {
    throw new UnsupportedOperationException("FilteringPrimitiveConverter doesn't have dictionary support");
  }

  @Override
  public void addBinary(Binary value) {
    for (ValueInspector valueInspector : valueInspectors) {
      valueInspector.update(value);
    }
    delegate.addBinary(value);
  }

  @Override
  public void addBoolean(boolean value) {
    for (ValueInspector valueInspector : valueInspectors) {
      valueInspector.update(value);
    }
    delegate.addBoolean(value);
  }

  @Override
  public void addDouble(double value) {
    for (ValueInspector valueInspector : valueInspectors) {
      valueInspector.update(value);
    }
    delegate.addDouble(value);
  }

  @Override
  public void addFloat(float value) {
    for (ValueInspector valueInspector : valueInspectors) {
      valueInspector.update(value);
    }
    delegate.addFloat(value);
  }

  @Override
  public void addInt(int value) {
    for (ValueInspector valueInspector : valueInspectors) {
      valueInspector.update(value);
    }
    delegate.addInt(value);
  }

  @Override
  public void addLong(long value) {
    for (ValueInspector valueInspector : valueInspectors) {
      valueInspector.update(value);
    }
    delegate.addLong(value);
  }
}
